JP4990591B2 - Lifting device for underwater equipment - Google Patents

Description

  The present invention relates to a lifting operation device for detaching an underwater device used underwater from at least a lifting device.

  Conventionally, when installing underwater equipment such as an underwater mixer in a sewage tank, a chain is attached to each underwater equipment, and during installation, the underwater equipment is suspended in the sewage tank using this chain. During maintenance and inspection of underwater equipment, the underwater equipment is lifted from the sewage tank by a chain. And generally, when using an underwater apparatus, it uses it in the state which engaged the upper end part of the chain | strand with the tank upper part.

  However, when the upper end of the chain is engaged, the slack of the chain may become excessive. In that case, the chain is caught in the moving part (rotating part) of the underwater device, and the underwater device is damaged. And may cause chain breakage.

  Further, during long-term use, the water chains are swung by the water flow and rubbed with each other, and the devices and the chains and the chain rings are rubbed together, resulting in damage to the devices and wear and cutting of the chains.

  Furthermore, since it is necessary to attach a chain to each device, it is necessary to prepare a large number of chains in a large-scale treatment plant that handles a large number of units. I can't.

In order to avoid these problems, for example, as shown in Patent Document 1 and Patent Document 2, etc., an attachment / detachment device that can be attached to and detached from the underwater device is attached to a lifting device such as a hoisting machine for hanging the underwater device. There has been proposed an apparatus in which an elevating device and an underwater device can be attached and detached underwater without using a chain.
German Patent Publication No. 2849877 JP-A-9-170599

  However, in the above-mentioned conventional Patent Documents 1 and 2, not only the number of parts is large, but also the lifting device and the underwater device are attached and detached with a complicated operation by using a spring device, etc. There were problems in terms of operational reliability and operational stability.

  Therefore, the applicant of the present application provides a hook body having two engaging portions for installation and lifting as a detachable device provided in the lifting device so as to be swingable around the horizontal axis, and is installed when installing the underwater equipment. When the underwater device is hung and moved downward by suspending the underwater device, the hook body is rotated by its own weight to release the engagement between the installation engagement portion and the underwater device. When lifting the device, the hook body is moved downward, and the hook body is rotated against its own weight by the contact between the lifting engagement portion and the underwater device, and then the underwater device is guided to the lifting engagement portion. An attachment / detachment device in which the hook body is rotated by its own weight to engage the lifting engagement portion and the underwater device, and a lifting operation device using the same has been proposed (Japanese Patent Application No. 2006-22304).

  However, in the proposed lifting operation device, the underwater device reaches the installation position, and thereby the load on the hook body is released (the load applied to the hook body becomes unloaded), so that the hook body is moved by its own weight. Since it is configured to release the engagement between the installation engaging portion and the underwater device, for example, when the load on the hook body is released for some reason during the downward movement of the underwater device, There is a possibility that the hook body is rotated by its own weight and the engagement between the installation engaging portion and the underwater device is released.

  The present invention has been made in view of such a point, and an object of the present invention is to improve the structure of the lifting / lowering operation device provided with a hook body that rotates when a load is released, so that the underwater device can be moved downward. Even if the load of the hook body is removed during the process, the engagement between the hook body and the underwater device is not released, and thereby the underwater device is reliably installed.

  In order to achieve the above object, according to the present invention, the posture of the underwater device changes between when the underwater device is lowered and when the underwater device reaches the installation position. By changing the engagement position of the hook body, even if the load of the hook body is removed while the underwater device is descending, the engagement between the hook body and the underwater device is not released, and the hook body reaches the installation position and The hook body and underwater equipment are disengaged for the first time when the load is removed.

  Specifically, the raising / lowering operation device for an underwater device according to the present invention is an elevating device for detaching at least an underwater device that is suspended by an elevating device to move up and down between water and water and installed at an installation position in water. It is an operating device.

  The lifting operation device includes a frame that is suspended from the lifting device, a hook body that is swingably supported by the frame with a horizontal pivot axis, and is attached to the underwater device, and the hook body is And a hanging part to be engaged.

  The hook body includes an installation engagement portion that is engaged with the suspension portion when the underwater device is detached from the lifting device and installed in the water. The underwater device is suspended while the portion is set to have a no-load posture in which the phase is changed in the swinging direction with respect to an extension line connecting the pivot axis of the hook body and the center of gravity of the hook body. When the unit is engaged with the installation engagement unit and moved downward, the underwater device is rotated to an unloaded posture at the installation position of the underwater device so that the engagement between the suspension unit and the installation engagement unit is released. It is configured.

  And this raising / lowering operation apparatus, when the said engaging part for installation engages with a suspension part, when the said underwater apparatus descends when the said underwater apparatus descends, and when an underwater apparatus is installed in an installation position When the installation position of the underwater device is different from each other, the engagement position of the suspension part with the installation engagement part is changed between the downward movement and the installation state at the installation position. When the joint position changing mechanism and the underwater device are in the lowered posture, the suspension part and the hook body are engaged with each other in the vicinity of the engagement position with the installation engagement part in the suspension part, thereby While preventing the hook body from rotating to the no-load posture and releasing the engagement between the hanging portion and the installation engagement portion, the underwater device reaches the installation position and changes to the installation posture. Sometimes the engagement position is changed Accordingly, the engagement between the hanging part and the hook body is released, and the hook body is allowed to rotate to an unloaded posture and the engagement between the hanging part and the installation engaging part is released. And a regulation unit.

  According to this configuration, when the underwater device is submerged in the water, the underwater device is engaged with the hook engaging member at the hanging portion. In this state, since the hanging load of the underwater device is applied to the hook body engaging portion, the hook body is positioned from the no-load posture to the position where the hook engaging portion is directly under or near the pivot axis of the hook body. Rotate to change. In this state, the underwater device descends from the water position by the lowering operation of the lifting device and sinks into the water. When the underwater device reaches the installation position and the descent stops, and only the hook body descends relatively, the hook body rotates to a no-load posture in a direction in which the installation engagement portion is detached from the suspension portion of the underwater device due to its own weight. Move. As a result, the engagement between the installation engaging portion and the hanging portion of the underwater device is released, and the underwater device is separated from the lifting device. Thereafter, the hook body is pulled up onto the water in an unloaded state by the lifting operation of the lifting device.

  Further, in this configuration, the elevating operation device includes an engagement position changing mechanism, so that the underwater device has a lowered posture when moving downward, and an installed posture when reaching the installation position and installed. Become different from each other. Along with the change in the posture, the engagement position of the hanging portion with the installation engagement portion is changed during the downward movement and when the installation position is reached.

  Furthermore, in this configuration, when the underwater device is in the descending posture, a restriction portion that engages the installation engagement portion and the suspension portion in the vicinity of the engagement position of the suspension portion is provided. For this reason, even if the load of the hook body is removed during the downward movement of the underwater device, the hook body is rotated to the no-load posture by the restricting portion, and the engagement between the hanging portion and the installation engagement portion is performed. It is prevented from being released.

  On the other hand, when the underwater device reaches the installation position and changes to the installation posture, the engagement position of the installation engagement portion with respect to the suspension portion is changed, whereby the hook body and the suspension portion between the restriction portion and the suspension portion are changed. The engagement is released, and as described above, the hook body rotates to the no-load posture and the engagement between the hanging portion and the installation engagement portion is released.

  Therefore, in this configuration, the hook body does not come off from the hanging portion during the downward movement of the underwater device, and the underwater device can be reliably installed at the installation position.

  The engagement position changing mechanism is guided by a guide member extending in a vertical direction between the water and the installation position to guide the underwater equipment to move up and down, and the underwater equipment is orthogonal to the guide member. In a state where the underwater device is in a lowered posture, a slide portion that supports the underwater device so as to be swingable about a predetermined swing fulcrum between the posture and the lowered posture inclined with respect to the guide member, An engagement portion of the suspension portion with which the installation engagement portion engages, and the engagement portion includes a vertical line passing through the center of gravity of the underwater device in the installation posture and the swinging portion. It is good also as arrange | positioning in the position between the perpendicular lines which pass a dynamic fulcrum.

  As a result, the underwater device is supported by the slide portion so as to be swingable about a predetermined swing fulcrum, and the engaged portion of the suspension portion is a vertical line passing through the center of gravity of the underwater device and the vertical passing through the swing fulcrum. When the underwater device is suspended from the hook body by engaging the hook engaging portion and the suspended portion engaged portion, As the center of gravity of the underwater device deviates from the engaging portion, a moment acts on the underwater device, and the underwater device automatically rotates and assumes a lowered posture.

  On the other hand, when the underwater device reaches the installation position, the underwater device rotates in the opposite direction to the installation posture, so that the hook engaging engagement portion is relative to the engaged portion. The engagement position is changed accordingly.

  As described above, the engagement position changing mechanism having a simple configuration including the slide portion that supports the underwater device so as to be swingable and the engaged portion formed at a position deviated from the vertical line passing through the center of gravity of the underwater device. The change of the posture of the underwater device and the change of the engagement position associated therewith can be automatically performed.

  The hanging part may have an inclined part that has an upward gradient from the center of gravity of the underwater device toward the engaged part. In this way, when the underwater device is suspended from the hook body, the hook engaging portion is guided by the inclined portion and reliably engaged with the engaged portion. During the downward movement, the underwater device is stably held in the downward posture.

  The hook body further includes a lifting engagement portion that is engaged with a suspension portion of the underwater device when the underwater device is lifted by a lifting device, and the lifting engagement portion is configured to be hooked in a no-load state. Is located on an extension line connecting the pivot axis of the body and the center of gravity of the hook body, and when the hook body is moved down in the no-load posture, It is good also as providing the guide part which guides so that a hook body may be rotated by contact | abutting, and a suspension part may be engaged with the engaging part for lifting.

  In this way, when an underwater device in the water is engaged with the hook body and pulled up onto the water, the hook body is placed in an unloaded state, and the hook body is placed in an unloaded posture and submerged by the lowering operation of the lifting device. The descending hook body comes into contact with the suspension part of the underwater equipment in the water at the guide part, and the hook body is pushed by the contact between the guide part and the suspension part to rotate from the no-load posture and suspend. The part is guided to engage with the lifting engaging part. When the hanging portion is completely engaged with the lifting engaging portion by further lowering of the hook body, the guide restriction is removed by the hanging portion, and the hook body rotates in the reverse direction by its own weight and returns to the no-load posture. . Thereafter, the lifting device is lifted to raise the hook body and the underwater equipment engaged with the lifting engagement portion of the hook body at the suspension portion.

  Accordingly, as described above, simply by lifting and lowering the hook body, the underwater device is automatically disengaged from the hook engaging portion and the underwater device is separated from the attaching / detaching device. Since the underwater device can be connected to the attachment / detachment device by engaging the suspension portion of the underwater device with the lifting engagement portion, the lifting device and the underwater device can be attached / detached with a simple operation to operate the lifting operation device. Reliability and operational stability can be improved. Moreover, since the underwater device can be attached and detached with only one hook body, the number of parts can be reduced.

  As described above, according to the lifting / lowering device for an underwater device of the present invention, the lowering posture when the underwater device is moving downward and the installation posture when reaching the installation position are different from each other. The engagement position of the lowering portion with the installation engaging portion is changed between the downward movement and the installation state at the installation position, and when the underwater device is in the lowering posture, the hook body is located near the engagement position of the suspension portion. Even if the load of the hook body is removed during the downward movement of the underwater device, the hook body rotates to the no-load posture and is installed with the suspension part. The engagement with the engagement portion can be prevented from being released. On the other hand, when the underwater device reaches the installation position and changes to the installation posture, the engagement between the hook body and the hanging part by the restriction part is released along with the change of the engagement position, It can rotate to a no-load posture by its own weight to release the engagement between the hanging portion and the installation engaging portion. As a result, the underwater device can be reliably installed.

  Hereinafter, the best embodiment of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application, or its application.

  4 and 5 show an elevating device A for underwater equipment according to an embodiment of the present invention. 1 is a sewage tank in which sewage is stored, 2 is a tank bottom of the sewage tank 1, and 3 is a base installed so as to protrude horizontally above the surface of the sewage in the sewage tank 1, Between the base 3 and the tank bottom 2, a columnar guide member 6 made of, for example, a rectangular tube extending in the vertical vertical direction is erected. The upper end portion of the guide member 6 is attached and fixed to the front end side surface of the base 3 at the rear surface (left side surface in the figure), and the lower end portion is fixedly attached to the receiving base 4 installed on the upper surface of the tank bottom 2. This guide member 6 constitutes an installation means for installing an underwater mixer 10 to be described later, and a stopper 7 extending horizontally to the front side (right side in the drawing) and a rear oblique side are disposed near the tank bottom 2. A supporting leg 8 extending downward is integrally projected, and a lower end portion of the supporting leg 8 is fixed to the tank bottom 2 on the rear side of the cradle 4. The supporting leg 8 reinforces the standing state of the guide member 6. is doing.

  An underwater mixer 10 as an underwater device is supported on the guide member 6 so as to be movable up and down. The underwater mixer 10 is built into the motor housing 11 and the motor housing 11, and an output shaft (not shown) whose front end portion penetrates the motor housing 11 in a liquid-tight manner and projects in the horizontal direction toward the front side of the motor housing 11. And an impeller 12 (propeller) attached to the front end of the output shaft of the motor so as to rotate together. The impeller 12 is rotated by the electric motor to flow horizontally in the sewage in the sewage tank 1. And stir the sewage. Note that a power cable (not shown) of the electric motor penetrates the motor housing 11 in a liquid-tight manner and extends to the outside.

  A slide portion 13 extending in the vertical direction is integrally attached to the rear end portion of the motor housing 11. The slide portion 13 has a substantially U-shaped cross section and is externally fitted to the guide member 6 from the front side. In the same figure, the upper and lower end portions of the slide portion 13 protrude to the rear side, and the roller 13a can be rotated between the upper and lower protrusion portions between the lower protrusion portions with the horizontal and horizontal axis centers respectively. It is supported by. As a result, the underwater mixer 10 can be moved up and down by the guide member 6 by sliding the slide portion 13 along the guide member 6 by the rolling of the roller 13a, and the underwater mixer is installed at its lower end (installation position). 10 is seated on the stopper 7 and is installed in detail. As will be described in detail later, the submersible mixer 10 is installed on the guide member 6 in an installation posture orthogonal to the guide member 6 (see FIG. 4). The roller 13a is supported so as to be able to swing between a tilted downward posture (see FIG. 5) and using the roller 13a as a swing fulcrum.

  In addition, a hanging portion 14 is integrally projected from the upper portion of the motor housing 11. The hanging portion 14 is formed by, for example, bending a rod member into a substantially triangular shape, and is arranged along a vertical plane in the front-rear direction with the intermediate bent portion positioned at the upper end and both ends positioned at the lower end. The lower end portions (both end portions) of the motor housing 11 are attached and fixed to the upper portion of the motor housing 11 in a state where the lower end portions are arranged in the front-rear direction. When this suspension part 14 is explained in further detail, the substantially triangular suspension part 14 includes an inclined part 14a that has an upward slope from the front side (impeller 12 side) to the rear side of the underwater mixer 10, and a vertical direction. The portion corresponding to the apex angle at which the inclined portion 14a and the vertical portion 14b intersect with each other is a position shifted from the vertical line passing through the center of gravity of the underwater mixer 10 in the installed posture. At the same time, the underwater mixer 10 is located at a position shifted from the vertical line passing through the roller 13a, which is the swing fulcrum (see FIGS. 4 and 11B). The portion corresponding to this apex angle is positioned at the uppermost position in a state where the underwater mixer 10 is in the lowered posture, and engages with first or second engaging portions 35 and 36 of the hook body 34 described later. It becomes the engaged part 14c (refer FIG.5 and FIG.11 (a)).

  A support column 17 is erected on the base 3, and a suspension arm 18 is attached to the upper end of the support column 17 so that the tip of the support column 17 is positioned almost directly above the underwater mixer 10 at the installation position. A hoisting machine 19 as a lifting device that lifts and lowers the submerged mixer 10 along the guide member 6 is suspended from the tip of the suspension arm 18. Although not shown, the winder 19 rotates the winding drum (winding sprocket) by a built-in drive motor and winds the winding chain 20 around the winding drum or feeds it from the winding drum, which will be described later. The underwater mixer 10 is moved up and down via the attachment / detachment device 24. When the winding machine 19 is wound up and the winding chain 20 is wound around the take-up drum, the attachment / detachment device 24 (underwater mixer 10) is raised. When the winding chain 20 is fed out from the winding drum by the feeding operation, the attachment / detachment device 24 (underwater mixer 10) is lowered.

  An attachment / detachment device 24 is attached to the lower end portion of the winding chain 20. This attachment / detachment device 24 is for attaching / detaching the underwater mixer 10 that is suspended by the winding machine 19 by the winding chain 20 and moves up and down between the water and the water to / from the winding chain 20 (winding machine 19). As shown in detail in FIG. 3, the hoist 19 has a frame 25 that is suspended by the hoisting chain 20. The frame 25 includes a frame main body 26 having a U-shaped cross section that is open on the lower side and extends in the front-rear direction. Eye bolts 27 are provided at the front end (right end in FIG. 2) and rear end of the upper surface of the frame main body 26, respectively. It is fixed. Each eyebolt 27 is connected to the lower ends of the chains 28, 28 having the same length, and the upper ends of both the chains 28, 28 are connected to one connecting ring 29. The lower ends are connected, and an isosceles triangle is formed by the chains 28, 28 and the frame body 26 between the eyebolts 27, 27, and the connecting ring 29 at the upper end is positioned directly above the hook body 34 to be described later. It is supposed to be located in.

  A slide portion 31 is integrally attached to the rear end portion of the frame body 26 via a connecting portion 30. As shown in FIGS. 2 and 3, the slide portion 31 is formed by bending a bar member into a U-shape, and the guide member 6 that guides the submerged mixer 10 up and down leaves the center portion of the rear surface. It is mated. That is, the frame 25 is cantilevered and supported by the single guide member 6 by the slide portion 31 at the rear end, and the detachable device 24 is guided by sliding the slide portion 31 along the guide member 6. The member 6 is supported so as to be movable up and down.

  A pair of front and rear brackets 32 and 32 extending downward are provided at a central portion on the lower surface of the frame main body 26 (may be a substantially central portion on the front and rear) with a gap therebetween, and a hook body 34 is provided between the brackets 32 and 32. It is supported so as to be swingable through a pin 33 having a horizontal longitudinal axis. In other words, the hook body 34 swings with respect to the frame 25 in a horizontal vertical plane perpendicular to the vertical vertical plane along the hanging portion 14 of the underwater mixer 10 with a horizontal longitudinal axis of rotation. Supported as possible.

  For example, the hook body 34 is formed by processing a thick plate, and as shown in FIG. 1, when the underwater mixer 10 is lifted by the hoisting machine 19, the hook body 34 is engaged with the hanging portion 14 of the underwater mixer 10. A first engaging portion 35 as an engaging portion, and located on the right side (right side in FIG. 1) of the first engaging portion 35, when the underwater mixer 10 is detached from the hoist 19 and installed in the water. A second engagement portion 36 as an installation engagement portion, a balance portion 37, and a first guide portion 38 that are engaged with the suspension portion 14 are provided.

  Specifically, when the hook body 34 is in a no-load posture, which will be described later, the first engagement portion 35 moves upward from the pin 33 that is the pivot axis of the hook body 34 and then moves upward on the left side. It is formed in a hook shape that is curved. On the other hand, the second engaging portion 36 is formed in a hook shape that curves from the pin 33 to the right side (right side in FIG. 1) obliquely downward and then curved upward on the left side. That is, any of the engaging portions 35 and 36 has a hook shape that can be engaged with the hanging portion 14 of the underwater mixer 10, and each inside (portion where the hanging portion 14 enters) is on the pin 33 side (rotation axis). The suspended portion accommodation position of the first engagement portion 35 and the suspension portion accommodation position of the second engagement portion 36 are the same as the suspension portion accommodation position of the second engagement portion 36. 1 is shifted by a predetermined phase angle θ in the counterclockwise direction in FIG.

  Further, the balance portion 37 extends from the pin 33 to the left side (left side in FIG. 1), that is, obliquely downward toward the first engagement portion 35 on the opposite side to the second engagement portion 36, and this balance portion. The weight of 37 is set to be equal to that of the second engaging portion 36, and in the no-load state where the underwater mixer 10 is not engaged by the first or second engaging portion 35, 36, the hook body 34 is The first engaging portion 35 (specifically, the suspended portion accommodation position) is on an extension line connecting the rotation axis (pin 33) of the hook body 34 and the center of gravity of the hook body 34 (in other words, the rotation of the hook body 34). The second engagement portion 36 is set to be in a no-load posture that is located at a position that is shifted by an angle θ in the swing direction with respect to the first engagement portion 35. Yes.

  Further, the first engaging portion 35 is formed with an extension portion 35a extending from the tip portion to the diagonally lower right side opposite to the tip portion, and the extension portion 35a and the tip portion of the first engagement portion 35 are formed. The first guide portion 38 is configured. The first guide portion 38 has a guide surface 39 having, for example, an intermediate convex arc shape extending over the outer surface of the distal end portion of the first engaging portion 35 or the outer surface of the extension portion 35a, and the hook body 34 is lowered in the above-described unloaded posture. When moved, the hook body 34 is pivoted counterclockwise in FIG. 1 by hanging the upper end of the suspension 14 of the submerged mixer 10 against the guide surface 39 of the first guide 38. The part 14 is guided to be engaged with the first engaging part 35.

  Then, when the hook body 34 is moved downward by engaging the suspending portion 14 of the submersible mixer 10 with the second engaging portion 36, the hook body 34 is rotated to an unloaded posture at the installation position of the submersible mixer 10. The lower portion 14 and the second engaging portion 36 are configured to be disengaged.

  Further, as shown in FIG. 6, the hook body 34 rotates around the guide member 6 by a gap for sliding between the slide portion 31 of the frame 25 and the guide member 6 to which the slide portion 31 is externally fitted. The amount of displacement a is set to be smaller (a <b) than the horizontal length b of the guide surface 39 of the first guide portion 38.

  Furthermore, at least one of the pair of front and rear brackets 32 and 32 (the bracket 32 positioned on the front side in the figure) is extended downward, and the extended portion is on the left side (see FIG. 1) and the second guide portion 43 is formed so as to face the guide surface 39 of the first guide portion 38 of the hook body 34 in the front-rear direction. Yes. When the hook body 34 moves down in a no-load posture, the second guide portion 43 abuts the second guide portion 43 against the suspension portion 14 of the submersible mixer 10 so that the suspension portion 14 is moved to the first position. The guide is guided so as to come into contact with the guide portion 38. The second guide portion 43 can be omitted.

  In addition, a balance weight 41 is attached and fixed to the front end portion of the lower surface of the frame body 26 so that the frame 25 can be suspended in a horizontal state when the hook body 34 is not loaded.

[Basic operation of the removable device]
Next, the basic operation of the attachment / detachment device 24 will be described. First, when the underwater mixer 10 that is in the water of the sewage tank 1 and is supported on the stopper 7 of the guide member 6 is engaged with the attachment / detachment device 24 for maintenance and inspection, etc., is pulled up to the water outside the sewage tank 1. Will be described with reference to FIG.

  The winding machine 19 is in a state where the winding chain 20 is wound around the winding drum, and the hook body 34 of the attachment / detachment device 24 attached to the lower end of the winding machine 19 is set to an unloaded posture in which no load is applied. Is fed out to feed out the winding chain 20 from the winding drum. As a result, as shown in FIG. 4, the attachment / detachment device 24 moves down along the guide member 6 by its own weight and sinks into the sewage tank 1.

  As shown in FIG. 7A, when the attaching / detaching device 24 descending approaches the upper end of the hanging portion 14 of the submerged mixer 10 on the stopper 7 and the attaching / detaching device 24 further descends, the first guide portion 38 of the hook body 34. The guide surface 39 comes into contact with the upper end portion of the hanging portion 14.

  Here, if the respective positions of the upper end portion of the hanging portion 14 of the underwater mixer 10 and the guide surface 39 of the first guide portion 38 of the hook body 34 are largely displaced in the horizontal and horizontal directions so as not to contact each other, Then, it becomes difficult for the suspended portion 14 and the first guide portion 38 to come into contact with each other.

  However, in this embodiment, since the second guide portion 43 is provided on the brackets 32, 32 of the frame 25 so as to face the first guide portion 38, when the attaching / detaching device 24 is further lowered, FIG. ), The hanging portion 14 abuts on the second guide portion 43 on the frame 25 side, and the frame 25 of the attachment / detachment device 24 is suspended on the guide surface 39 of the first guide portion 38 along with this abutment. 14 is guided to the left side of FIG. At this time, since the frame 25 has a backlash that can swing relative to the guide member 6, the frame 25 is guided by swinging around the guide member 6.

  After that, since the guide surface 39 of the first guide portion 38 is a middle convex arc surface that is inclined upward toward the left side, the hook body 34 is caused to be suspended by the downward movement of the detachable device 24. And the hook body 34 rotates in the same direction around the pin 33 from the unloaded posture as shown in FIG. 7C. Simultaneously with this rotation, the suspension part 14 slides upward on the guide surface 39 of the first guide part 38. When the hook body 34 is rotated while descending in this way, the attachment / detachment device 24 reaches, for example, the lower end position, and the upper end portion of the hanging portion 14 passes the tip of the first engagement portion 35, FIG. ), The hook body 34 is released from the moment by the suspending portion 14, and rotates in the clockwise direction in the reverse view of the above rotation due to its own weight to return to the no-load position.

  In this state, when the winding machine 19 is reversely wound up and the winding chain 20 is wound around the winding drum and the detaching device 24 is pulled up, the hanging portion 14 is suspended in the first engaging portion 35. Enters the part receiving position and is engaged. Thereafter, when the winding operation of the hoisting machine 19 is continued, the attaching / detaching device 24 rises, and the underwater mixer 10 engaged with the attaching / detaching device 24 also rises from the stopper 7 along the guide member 6. The attaching / detaching device 24 and the underwater mixer 10 are pulled up on the water surface at the rising end position. The pulled-up underwater mixer 10 may be separated from the attachment / detachment device 24 on the base 3, for example, and removed from the hoisting machine 19, and inspected.

  On the other hand, FIG. 8 demonstrates the case where the submerged mixer 10 after the said inspection is reinstalled in the water of the sewage tank 1, or the case where the new submerged mixer 10 is installed in the sewage tank 1 first. With respect to the detachable device 24 suspended from the hoisting chain 20 of the hoisting machine 19 on the water, this time using the second engaging portion 36 instead of the first engaging portion 35 of the hook body 34, The submerged mixer 10 is engaged with the second engaging portion 36 by the suspension portion 14. At that time, for example, the hook body 34 is manually rotated in FIG. 8 (FIG. 1) in the clockwise direction to change the second engaging portion 36 from the no-load posture so as to be positioned on the lower side. After inserting the suspension part 14 of the submerged mixer 10 into the joint part 36, the winding machine 19 is wound up to raise the attachment / detachment device 24 once, and as shown in FIG. The upper end portion of the hanging portion 14 is engaged with the joint portion 36. In this state, the suspension load of the underwater mixer 10 is applied to the second engagement portion 36 of the hook body 34, so that the hook body 34 is in the unloaded posture and the second engagement portion 36 is pivoted about the rotation axis of the hook body 34. The pin 33 is held in a state of being rotated and changed so as to be located directly under or near the pin.

  In this state, the hoisting machine 19 is unwound and the attaching / detaching device 24 descends along the guide member 6, and as shown in FIG. 5, the underwater mixer 10 engaged with the second engaging portion 36 of the hook body 34. Also descends from the water position along the guide member 6 and sinks into the water.

  Then, when the submersible mixer 10 moves to the installation position on the stopper 7 of the guide member 6 and the lowering stops, only the attaching / detaching device 24 is lowered by the continuous feeding operation of the hoist 19, as shown in FIG. Furthermore, the upper end portion of the hanging portion 14 of the submerged mixer 10 moves relatively to the tip side (upper side) of the second engaging portion 36 of the hook body 34 and is displaced in a direction away from the second engaging portion 36. When the hanging part 14 rises beyond the tip of the second engaging part 36 by further lowering of the hook body 34, the second engaging part 36 is detached from the hanging part 14 as shown in FIG. Thereafter, the detaching device 24 is lifted by the winding operation of the winder 19, and as a result, as shown in FIG. 8 (d), the hook body 34 is rotated counterclockwise in FIG. Returning to the load posture, the engagement between the second engaging portion 36 and the hanging portion 14 is completely released, and the underwater mixer 10 is separated from the attachment / detachment device 24. Thereafter, the take-up operation of the winder 19 raises the detachable device 24 in an unloaded state and pulls it up on the water. Thus, the installation of the underwater mixer 10 in water is completed.

[Disengagement prevention mechanism during installation]
As described above, in the lifting / lowering operation apparatus A, when the underwater mixer 10 reaches the installation position and the load of the second engaging portion 36 of the hook body 34 is released, the hook body 34 is rotated by its own weight and is 2 Since the engaging portion 36 is disengaged from the suspending portion 14, for example, when the load of the second engaging portion 36 comes off for some reason during the downward movement of the underwater mixer 10, There is a possibility that the second engaging portion 36 may come off from the hanging portion 14.

  Therefore, in the lifting operation device A according to the present embodiment, measures are taken to prevent the second engaging portion 36 from being detached from the hanging portion 14 while the underwater mixer 10 is being moved downward. .

  Specifically, as shown in FIGS. 9 to 11, a restricting portion 51 is attached in the vicinity of the engaged portion 14 c in the hanging portion 14. As shown in FIG. 9, the restricting portion 51 is formed, for example, by bending a rod member into a predetermined shape. Specifically, the base end of the restricting portion 51 is fixed to the vertical portion 14b of the suspending portion 14 so that it is lateral. After extending, it is bent forward of the underwater mixer 10 and is extended by a predetermined length toward the front of the underwater mixer 10 with a predetermined distance from the inclined portion 14a. The tip position of the restricting portion 51 is located on the rear side of the position of the hook body 34 when the underwater mixer 10 is in the installation posture (see FIG. 11B).

  This restricting portion 51 prevents the second engaging portion 36 from being detached from the hanging portion 14 by engaging with the second engaging portion 36 while the underwater mixer 10 is moving downward. To do.

  That is, the hanging part 14 has the inclined part 14 a and the engaged part 14 c corresponding to the rear end of the inclined part 14 a is shifted from the vertical line passing through the center of gravity of the underwater mixer 10. Is located. Therefore, when the underwater mixer 10 is engaged with the second engagement portion 36 by the suspension portion 14, a moment in the clockwise direction in FIG. 5 acts on the underwater mixer 10, and the second engagement portion 36 is suspended. While being engaged with the engaged portion 14c of the lowering portion 14, the underwater mixer 10 rotates around the roller 13a and assumes a lowered posture inclined downward with respect to the guide member 6 (FIGS. 5 and 11). a)).

  In this state, the restricting portion 51 is positioned at a side position of the second engaging portion 36, and as shown by the one-dot chain line in FIG. Even if the load of the engaging part is removed, the second engaging part 36 and the restricting part 51 (the suspended part 14 to which the restricting part 51 is fixed) are engaged with each other, so that the weight of the hook body 34 is caused. The rotation is restricted. As a result, while the underwater mixer 10 is moving downward, the engagement between the second engaging portion 36 and the hanging portion 14 is not released, and the underwater mixer 10 reliably reaches the installation position. .

  When the underwater mixer 10 reaches the installation position on the stopper 7, the underwater mixer 10 is changed in posture to an installation posture orthogonal to the guide member 6. Accordingly, as shown in FIG. 11B, the hook body 34 moves relatively forward with respect to the hanging portion 14, whereby the second engaging portion 36 is located on the front side of the restricting portion 51. Comes to be in position. In this state, since the second engaging portion 36 does not engage with the restricting portion 51, as described above, the hook body 34 rotates counterclockwise and returns to the no-load posture, and the second engaging portion 36 And the hanging part 14 are disengaged. Thus, installation of the underwater mixer 10 in water is completed.

[Function and effect]
Therefore, in this embodiment, since the chain is connected to the underwater mixer 10 and the submersible mixer 10 is not installed or pulled up using the chain, damage to the underwater mixer 10 when using the chain, There is no wear, cutting, or cost increase.

  Further, as described above, the suspension portion 14 of the underwater mixer 10 is engaged with the second engagement portion 36 of the hook body 34 in the attachment / detachment device 24 connected to the lower end portion of the winding chain 20 in the winding machine 19. Then, by simply lowering the attachment / detachment device 24 together with the underwater mixer 10 by the operation of the hoisting machine 19, the underwater mixer 10 is automatically suspended from the second engaging portion 36 of the hook body 34 at the installation position of the underwater mixer 10. The underwater mixer 10 can be separated by disengaging the lowering portion 14 to separate the underwater mixer 10 from the attachment / detachment device 24. On the other hand, simply by lowering the unloading attachment / detachment device 24 into the water, the suspension portion 14 of the underwater mixer 10 at the installation position is automatically engaged with the first engagement portion 35 of the hook body 34. The underwater mixer 10 can be connected to the detachable device 24 and then lifted. For this reason, the winder 19 and the underwater mixer 10 can be attached and detached with a simple operation, and the operation reliability and operation stability of the attachment / detachment device 24 can be improved. Moreover, since the underwater mixer 10 can be attached and detached with only one hook body 34, the number of parts can be reduced.

  Further, since the frame 25 of the attachment / detachment device 24 is supported by the slide portion 31 on the guide member 6 that guides the submersible mixer 10 up and down, using the guide member 6 that guides the submersible mixer 10 up and down, The guide member 6 can raise and lower the attachment / detachment device 24 stably and smoothly. Moreover, since the attachment / detachment device 24 is guided by the guide member 6 of the underwater mixer 10, the positioning of the first engagement portion 35 and the like of the attachment / detachment device 24 with respect to the hanging portion 14 is performed when the underwater mixer 10 is installed. Can be easily performed.

  The hook body 34 is horizontally horizontally moved around the guide member 6 by a gap for sliding between the slide portion 31 of the frame 25 in the attachment / detachment device 24 and the guide member 6 to which the slide portion 31 is externally fitted. Since the displacement amount “a” of the backlash that is displaced in the direction is smaller than the horizontal length “b” of the guide surface 39 that is the length of the first guide portion 38 in the guide direction, the gap between the frame 25 and the guide member 6 Even when the play around the guide member 6 of the frame 25 occurs due to the guide surface 39 of the first guide portion 38 of the hook body 34 coming into contact with the upper end portion of the hanging portion 14, the first guide portion 38 is moved underwater. The suspension part 14 of the mixer 10 can be reliably brought into contact, and the engagement operation between the first engagement part 35 and the suspension part 14 can be reliably performed.

  Further, even when the underwater mixer 10 is lifted, even if the hanging portion 14 and the first guide portion 38 of the hook body 34 of the detachable device 24 are displaced so as not to contact each other, the second guide portion 43 suspends the underwater mixer 10. The lowered portion 14 can be smoothly engaged with the first engaging portion 35, and the engagement between the suspended portion 14 and the first engaging portion 35 of the hook body 34 can be performed more reliably.

  Further, since the bracket 32 of the frame 25 of the attachment / detachment device 24 is extended downward to form the second guide portion 43, even if an unexpected impact or the like is applied to the underwater mixer 10 during lifting, the second guide portion 43. Accordingly, it is possible to restrict the suspension portion 14 of the underwater mixer 10 from being detached from the first engagement portion 35 of the hook body 34.

  Further, since the balance weight 41 for attaching the frame 25 to the horizontal state in a state where the hook body 34 is not loaded is attached and fixed to the front end portion of the lower surface of the frame body 26 in the attachment / detachment device 24, the hook body 34, the first engaging portion 35 of the hook body 34 can be stably positioned on an extension line connecting the rotation axis of the hook body 34 and the center of gravity of the hook body 34. The disengagement operation can be performed stably.

  In addition, the underwater mixer 10 is supported to be swingable with respect to the guide member 6, and the engaged portion 14 c of the hanging portion 14 is disposed at a position shifted from the center of gravity of the underwater mixer 10, and the suspension By providing the restricting portion 51 in the vicinity of the engaged portion 14c of the lowering portion 14, even if the load of the second engaging portion 36 is temporarily removed while the underwater mixer 10 is being moved downward, the restricting portion 51 The second engaging portion 36 is not detached from the suspended portion 14 by 51, and the second engaging portion 36 is detached from the suspended portion 14 only after the underwater mixer 10 reaches the installation position on the stopper 7. Therefore, the installation of the underwater mixer 10 can be performed reliably.

  Further, by providing the inclined portion 14a in the hanging portion 14, the second engaging portion 36 is stably engaged with the engaged portion 14c, and the certainty of installation of the underwater mixer 10 is further increased. Can be increased.

(Modification)
FIG. 12 is an enlarged view of the hanging portion 14 and the hook body 34 according to the modified example. In this modified example, the regulating portion 51 attached to the hanging portion 14 in the above embodiment is replaced with the hook body. 34 is attached.

  That is, the restricting portion 52 according to this modification includes a pin protruding rearward from the tip of the second engaging portion 36 formed in the hook shape on the rear surface side of the hook body 34, and the pin-shaped restricting portion 52. Is set to a length that interferes with the vertical portion 14b of the hanging portion 14 in a state where the second engaging portion 36 is engaged with the engaged portion 14c.

  Even if it does in this way, even if the load of the 2nd engaging part 36 comes off during the downward movement of the underwater mixer 10 similarly to the said embodiment, the control part 52 and the vertical part 14b will mutually engage. Accordingly, the hook body 34 is restricted from rotating due to its own weight, and the engagement between the second engaging portion 36 and the hanging portion 14 can be prevented from being released. On the other hand, when the underwater mixer 10 reaches the installation position on the stopper 7 and its posture is changed to the installation posture, the hook body 34 moves relatively forward with respect to the hanging portion 14. The portion 52 and the vertical portion 14b do not interfere with each other, the hook body 34 rotates counterclockwise and returns to the no-load posture, and the engagement between the second engaging portion 36 and the hanging portion 14 is released. . Thus, the underwater mixer 10 can be reliably installed at the installation position.

(Other embodiments)
In the above embodiment, the underwater mixer 10 is placed and installed on the stopper 7 of the guide member 6, but can also be placed on the tank bottom 2 and installed.

  Moreover, in the said embodiment, when the suspension part 14 of the submerged mixer 10 contact | abuts to the 2nd guide part 43 by the side of the flame | frame 25 to descend | fall at the time of the descent | fall movement of the attachment / detachment apparatus 24 at the time of pulling up the submerged mixer 10, the flame | frame 25 will be carried out. The suspension member 14 is rotated by a backlash with respect to the guide member 6 and guided so that the suspension portion 14 comes into contact with the guide surface 39 of the first guide portion 38. 11 is provided so as to be swingable in the left-right direction in FIG. 10, and the suspension part 14 is guided relative to the attachment / detachment device 24 by contact with the second guide part 43. Also good.

  In the above-described embodiment, the underwater device is the underwater mixer 10, but the present invention is naturally applicable to other underwater devices such as an underwater aerator and a submersible pump.

  Moreover, although each said embodiment has demonstrated the case of the underwater apparatus used by being sunk in the sewage tank 1, if it is an underwater apparatus used in water, such as water tanks and ponds other than the sewage tank 1, this is this. The invention can be applied.

  The present invention can automatically remove the lifting device from the underwater device in water with a simple structure when installing the underwater device in water, and can reliably install the underwater device in the installation position. Therefore, it is extremely useful and has high industrial applicability.

It is an enlarged front view of an attachment / detachment device. It is an enlarged side view of an attachment / detachment device. It is an enlarged plan view of the attachment / detachment device. It is a side view which shows the state which the attachment or detachment apparatus approached the underwater apparatus for lifting in the raising / lowering operation apparatus of the underwater apparatus which concerns on embodiment of this invention. It is a side view which shows the state which detachable apparatus suspends underwater equipment and installs in an installation position. It is a top view which shows the rocking | fluctuation state of the horizontal direction of the flame | frame of an attachment / detachment apparatus. It is a figure which shows operation | movement of the hook body at the time of lifting of an underwater mixer. It is a figure which shows operation | movement of the hook body at the time of installation of an underwater mixer. It is a top view of the hanging part attached to the underwater mixer. It is a front view which shows a mode that rotation of a hook body is controlled at the time of a descent | fall movement of an underwater mixer. (A) Side view showing the engagement state between the hook body and the hanging part when the submerged mixer is moved downward, (b) Showing the engagement state between the hook body and the hanging part when reaching the installation position of the underwater mixer. It is a side view. It is a perspective view which shows the engagement state of the hook body which concerns on a modification, and a hanging part.

Explanation of symbols

10 Underwater mixer (underwater equipment)
13 Slide part (engagement position changing mechanism)
14 hanging part 14a inclined part 14c engaged part (engagement position changing mechanism)
19 Hoisting machine lifting device 25 Frame 34 Hook body 35 First engaging portion (engaging portion for lifting)
36 2nd engaging part (engaging part for installation)
38 1st guide part (guide part)
4 Lifting operation device 51, 52 Restriction part 6 Guide member A Lifting operation device

Claims (4)

An elevating operation device for installing an underwater device that is suspended by an elevating device and moves up and down between the water and the water at least at an installation position in the water by separating from the elevating device,
A frame suspended from the lifting device;
A hook body swingably supported by the frame with a horizontal rotation axis;
A hanging portion attached to the underwater device and engaged with the hook body,
The hook body includes an installation engagement portion that is engaged with the suspension portion when the underwater device is detached from the lifting device and installed in the water. The underwater device is suspended while the portion is set to have a no-load posture in which the phase is changed in the swinging direction with respect to an extension line connecting the pivot axis of the hook body and the center of gravity of the hook body. When the unit is engaged with the installation engagement unit and moved downward, the underwater device is rotated to an unloaded posture at the installation position of the underwater device so that the engagement between the suspension unit and the installation engagement unit is released. Composed of
The lowering posture of the underwater device when the installation engagement portion engages with the suspension portion and the underwater device moves downward, and the installation posture of the underwater device when the underwater device is installed at the installation position. Engaging positions changing mechanism in which the engagement position with the installation engagement portion in the hanging portion is changed between the descending movement and the installation state at the installation position,
When the underwater device is in the lowered posture, the hook body is engaged with the hook body in the vicinity of the engagement position of the hanging portion with the installation engagement portion, so that the hook body is in an unloaded posture. And the engagement between the suspension part and the installation engagement part is prevented from being released. On the other hand, when the underwater device reaches the installation position and changes to the installation posture, the engagement position Is changed, the engagement between the hanging portion and the hook body is released, the hook body is turned to a no-load posture, and the engagement between the hanging portion and the installation engaging portion is released. An elevating operation device for an underwater device, further comprising a restricting portion that allows the underwater device. In the raising / lowering operation apparatus of Claim 1,
The engagement position changing mechanism is
The underwater device is guided up and down by being guided by a guide member extending vertically between the water and the installation position, and the installation posture in which the underwater device is orthogonal to the guide member and the guide member A slide portion that supports the underwater device so as to be swingable about a predetermined swing fulcrum between the tilted and lowered posture,
In the state where the underwater device is in a lowered posture, the engaged portion of the hanging portion that the engaging portion for installation engages,
The ascending / descending operation device, wherein the engaged portion is disposed at a position between a vertical line passing through the center of gravity of the underwater device in the installation posture and a vertical line passing through the swing fulcrum. In the raising / lowering operation apparatus of Claim 2,
The lifting / lowering operation device according to claim 1, wherein the hanging portion includes an inclined portion that is inclined upward from the center of gravity of the underwater device toward the engaged portion. In the raising / lowering operation apparatus as described in any one of Claims 1 thru | or 3,
The hook body further includes a lifting engagement portion that is engaged with a hanging portion of the underwater device when the underwater device is lifted by the lifting device,
The lifting engaging portion is located on an extension line connecting the pivot axis of the hook body and the center of gravity of the hook body in a no-load state,
Further, when the hook body is moved downward in the unloaded posture, the hook body is rotated by contact with the suspension part of the underwater device in the installation position, and the suspension part is engaged with the lifting engagement part. A lifting and lowering operation device further comprising a guide portion for guiding them to be combined.

Images